Usually I write a cron onliner and /etc/crontab contains all the documentation I usually need.
I don't often write service or timer files. So I always have to look up a minimal working example. When I finished wirting them I'm not sure if it is `systemctl start foo.timer` or `systemctl enable foo.timer` etc.
So some kind of `create-systemd-timer` (which generates a skeleton) would help me. 😉